Ophthalmic mounting



Aug 22, 1933 N. M. BAKER OPHTHALMIG MOUNTING Filed Nov 9, 1928 Fatented Aug. 22, 1933 UNITED STATES PATEN T OFFICE 1,923,566 OPHTHALMIC MOUNTING setts Application November 9, 1928. Serial No. 318,149

2 7 Claims.

This invention relates to improvements in ophthalmic mountings and has particular reference to protection goggles for aviators and the like.

The principal object of the invention is to provide improved means for connecting the lens holding means of an ophthalmic mounting so that the distance between them may be regulated.

Another object of the invention is to provide improved face contacting means.

Another object of the invention is to provide improved ventilation for the eyecups.

Another object of the invention is to provide an economical construction for obtaining the required results of such a device with 21. fewer number of parts, less expensive to manufacture and more simple in operation.

Other objects and advantages of the invention will become apparent from the following description taken in connection with the accompanying drawing, and it will be apparent that many changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as eX- pressed in the accompanying claims. I, therefore, do not wish to be limited to the exact details of construction and arrangements shown and described as the preferred forms only have been shown by way of illustration.

Referring to the drawing:

Fig. I is a front view of a goggle embodying the invention;

Fig. II is a top view of Fig. I;

Fig. III is a partial perspective view showing the relationship of the bridging parts;

Fig. IV is a cross section on line IVIV of Fig. 11;

Fig. V is a cross section on line VV of Fig.

Fig. VI is a fragmentary front view of one of the ventilation openings.

It has been found from experience in manufacturing goggles of this general character that they have been intricate and expensive due to a large number of parts which have a tendency to work loose at their connections. These goggles have comprised generally a double walled eyecup, whereas I provide a simplified single walled cup, and in my device both the ventilating openings and shields for said openings are formed by merely pressing outward the eyecup wall and the eyecup connecting means is formed of a fewer number of parts of simple construction.

Referring to the drawing, wherein similar reference characters denote corresponding parts throughout, the goggle embodying the invention comprises a pair of eyecups 1 connected by the bridge 2 and having the endpieces 3 adapted to form a' connection for a headband to secure the goggles in position before the face of the wearer. 1

Each of these eyecups 1 comprises a frame 4 having at its forward or outer edge the flange lens seat 5, and as shown in Fig. IV, the rearward or inner edge of the frame 4 is turned or flanged outward, as indicated at 6, and carries 5 hoods or shields 10 for said ventilation openings which are very simple and economical to construct. On the frame 4 are secured the lugs 11 which have'upward pintle projections 12. On the pintle projections 12 are pivotally positioned the bridge members 13 and'14. These members 13 and 14 have abutting serrated faces 15 and 16, respectively. The member 13 has the screw receiving opening 17 and the member 14 has the longitudinal slot 18. A thumb screw member 19 passes through the slot 18 and is seated in the I screw receiving opening 17.

The operation is as follows: To change the distance between the eyecups, loosen the screw 19 to a point where the serrations in the members 13 and 14 may be disengaged; slide the* member 14 to desired relative position with the member 13, the screw 19 sliding in the slot 18;. re-engage the serrations on the faces of the members 13 and 14 and tighten the screw 19 to re-lock the members 13 and 14 together.

From the foregoing description it will be seen that I have provided simple, efficient and coo-- nomical means for obtaining all of the advantages of the invention, particularly of providing adjustable means for connecting the eyecups-' with means by which the distance between them may be readily changed as desired. I

Having described my invention,'I claim:

1. In a device of the character described, an

pair of separated lens holding members, an

projecting therefrom, the axis of said pintle being substantially vertical, a pair of dog toothed racks, overlying and meshing with each other, each rack having one free endvand one end with a relatively long pintle bearing pivotally fitted to its respective pintle, said pintle rack to which it is attached the racks may be longitudinally adjusted with respect to each other. I l

2. In a device of the character described, a

pair of separated lens holding members; bearing means on the nasal side of each of the lens holding members, horizontally aligned with each other, and arranged to provide a relatively long pivoted bearing, the axis of said bearing being substantially vertical, a pair of dog toothed racks overlying and meshing with each other,

each rack having one free end and one end with a relatively long bearing member pivotally fitted to its respective bearing member on the lens holding means, said bearing being in length equivalent to two separated point bearings sufficient to hold the lens holding members in alignment without sagging to hold the lenses in required optical alignment, one of said racks having a. longitudinal slot therein, and securing means extending through said slot and attached to the other of said racks, whereby on partial loosening of the securing means without releasing said means from said. rack to which it is attached the racks may be longitudinally adjusted with respect to each other.

NELSON M. BAKER. 

